Hagop Hagopian (or Agop Agopian; Armenian: Յակոբ Յակոբեան; 1951 – 28 April 1988) was one of the founders and the main leader of ASALA.

[4] As leader of ASALA, he directed attacks and assassinations of Turkish diplomats and their families in various countries of the world.

He broke with the Palestine Liberation Organization, which had given ASALA training and support, and linked up with the anti-PLO leader Abu Nidal.

[9] According to the unidentified U.S. official quoted by The Washington Post, in the late 1980s ASALA had grown more mercenary due to financial difficulties, and "Hagopian became a gun for hire".

[10] Hagopian was assassinated outside his home in Athens' Palaio Faliro suburb at 4:30 a.m. on 28 April 1988,[11] while he was waiting for a taxi to take him to the airport for a flight to Belgrade.

A Greek police official said two armed men got out of a parked car as Hagopian walked out of his apartment building carrying his luggage.